implement `MOD` and `REM` #116

Job	Run time
build (ubuntu-latest, Debug)	4m 47s
build (ubuntu-latest, Release)	5m 7s
build (windows-latest, Debug)	7m 23s
build (windows-latest, Release)	9m 44s
per-build-publish	9m 17s
nuget-publish	0s
	36m 18s

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